oil sealed pump 油封泵
oil sealed rotary vacuum pump 油密封式旋转真空泵
oil-sealed bumper sub 油封式震击器
oil-sealed jar safety joint 油封式震击器安全接头
rotary oil sealed mechanical pump 旋转式油封机械泵
oil-sealed pump 油封泵
Rotary oil-sealed pump 回转油垫帮浦
oil-sealed stuffer 油封填料
Discusses the relationship between pumping speed and inlet pressure of an oil-sealed mechanical pump and the reason why its pumping efficiency drops down.
该文介绍了油封机械泵的抽速与入口压力的关系、泵抽气效率下降的原因，指出泵入口管道的流导和油蒸汽逆流是造成泵抽速下降的主要原因。
Following the explosion and fire on the rig, the blow-out preventer on the sea bed should have automatically sealed the well, but it failed, resulting in the massive oil spill.
在油井发生爆炸以及油井起火后，海底上的防喷器本来应该自动将油井封住，但是未能做到这一点，导致大规模的石油泄漏。
As previous analyses of the accident, including BP's own, have shown, the flawed cementing that let oil into the bottom of the supposedly sealed well was not the only issue.
正如之前对于事故的分析(包括BP自己的)所指出的，有问题的水泥灌浆作业致使石油进入到了本应密封的油井的底部，但这并不是全部的原因。
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